diff options
Diffstat (limited to 'lib/CodeGen/RegAllocFast.cpp')
| -rw-r--r-- | lib/CodeGen/RegAllocFast.cpp | 8 |
1 files changed, 2 insertions, 6 deletions
diff --git a/lib/CodeGen/RegAllocFast.cpp b/lib/CodeGen/RegAllocFast.cpp index f44478e5dd..6bfadf903e 100644 --- a/lib/CodeGen/RegAllocFast.cpp +++ b/lib/CodeGen/RegAllocFast.cpp @@ -520,12 +520,9 @@ RAFast::defineVirtReg(MachineInstr *MI, unsigned OpNum, if ((!Hint || !TargetRegisterInfo::isPhysicalRegister(Hint)) && MRI->hasOneNonDBGUse(VirtReg)) { const MachineInstr &UseMI = *MRI->use_nodbg_begin(VirtReg); - unsigned SrcReg, DstReg, SrcSubReg, DstSubReg; // It's a copy, use the destination register as a hint. if (UseMI.isCopyLike()) Hint = UseMI.getOperand(0).getReg(); - else if (TII->isMoveInstr(UseMI, SrcReg, DstReg, SrcSubReg, DstSubReg)) - Hint = DstReg; } allocVirtReg(MI, *LRI, Hint); } else if (LR.LastUse) { @@ -789,14 +786,13 @@ void RAFast::AllocateBasicBlock() { } // If this is a copy, we may be able to coalesce. - unsigned CopySrc, CopyDst, CopySrcSub, CopyDstSub; + unsigned CopySrc = 0, CopyDst = 0, CopySrcSub = 0, CopyDstSub = 0; if (MI->isCopy()) { CopyDst = MI->getOperand(0).getReg(); CopySrc = MI->getOperand(1).getReg(); CopyDstSub = MI->getOperand(0).getSubReg(); CopySrcSub = MI->getOperand(1).getSubReg(); - } else if (!TII->isMoveInstr(*MI, CopySrc, CopyDst, CopySrcSub, CopyDstSub)) - CopySrc = CopyDst = 0; + } // Track registers used by instruction. UsedInInstr.reset(); |